Rockaholic Posted June 29, 2013 Share Posted June 29, 2013 (edited) This is another Pennsylvanian piece from Indiana surface mine spoil piles. There is a positive impression on one side of the rock and a negative impression on the other side of the rock. The first two photos are the negative impression the second two the positive. Could this be a cross section of a Lepidstrobus with small Lepidostrobophyllum radiating out? Maybe the base of a cone? Seems small for a cone of a Lepidodendron.Maybe early in the development of a cone?Any thoughts would be appreciated. Edited June 29, 2013 by Rockaholic Link to comment Share on other sites More sharing options...
Fossildude19 Posted June 29, 2013 Share Posted June 29, 2013 (edited) What about a cross section of a calamites node or stem? Regards, Edited June 29, 2013 by Fossildude19 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 IPFOTM -- MAY - 2024 _________________________________________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
Rockaholic Posted July 1, 2013 Author Share Posted July 1, 2013 (edited) What about a cross section of a calamites node or stem? Regards, This being a segment of a calamite did cross my mind also. It does resemble Annularia. Edited July 1, 2013 by Rockaholic Link to comment Share on other sites More sharing options...
evannorton Posted July 1, 2013 Share Posted July 1, 2013 I think it is an annularia radiata whorl. Cheers, Link to comment Share on other sites More sharing options...
Rockaholic Posted July 2, 2013 Author Share Posted July 2, 2013 I think it is an annularia radiata whorl. Cheers, Annularia was my first thought but the small size and bowl shaped appearance had me wondering if it was something else. Not sure of the growth pattern of an annularia whorl but may be this is an annularia in an early stage of development. Link to comment Share on other sites More sharing options...
piranha Posted July 2, 2013 Share Posted July 2, 2013 It appears to be a node of long-shield cone bracts. Attached for comparison of features is a sphenopsid cone from the Carboniferous of the Czech Republic. The morphology of the cone bracts differs slightly in shape and count but the center stalk cross-section looks to be similar to the mystery fossil. Link to comment Share on other sites More sharing options...
Rockaholic Posted July 3, 2013 Author Share Posted July 3, 2013 It appears to be a node of long-shield cone bracts. Attached for comparison of features is a sphenopsid cone from the Carboniferous of the Czech Republic. The morphology of the cone bracts differs slightly in shape and count but the center stalk cross-section looks to be similar to the mystery fossil. sphenopsid cone.jpg I believe you’ve resolved a mystery. It’s created another mystery for me, the nature of cones. Thanks for the ID. Link to comment Share on other sites More sharing options...
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